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Training Guide in Surface Weather Observations - Multiple Choices

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16. Prevail<strong>in</strong>g visibility is reported <strong>in</strong>:<br />

a. Nautical miles and fractions.<br />

b. Kilometers and fractions.<br />

c. Statute miles and fractions.<br />

d. Hundreds of feet.<br />

17. Of the follow<strong>in</strong>g, the most suitable objects for determ<strong>in</strong><strong>in</strong>g nighttime visibility are:<br />

a. Unfocused lights of moderate <strong>in</strong>tensity at known distances.<br />

b. Searchlights.<br />

c. High <strong>in</strong>tensity runway lights.<br />

d. Focused lights of moderate <strong>in</strong>tensity at known distances.<br />

18. Report sector visibility <strong>in</strong> the remarks whenever it:<br />

a. Is nonuniform<br />

b. Differs from prevail<strong>in</strong>g visibility by one or more reportable values and is less than 3 miles.<br />

c. Is less than 7 miles.<br />

d. Is nonuniform and differs from prevail<strong>in</strong>g visibility.<br />

19. Prevail<strong>in</strong>g visibility is reported as variable when it rapidly <strong>in</strong>creases and decreases by 1/2 or more<br />

miles and is less than:<br />

a. 7 miles<br />

b. 3 miles<br />

c. 4 miles<br />

d. 6 miles<br />

20. The follow<strong>in</strong>g are reported changes <strong>in</strong> prevail<strong>in</strong>g visibility. Put a check mark <strong>in</strong> front of those that<br />

require a SPECI to be taken.<br />

a. 5 miles to 3 miles<br />

b. 3 miles to 2 1/2 miles<br />

c. 2 1/2 miles to 2 miles<br />

d. 2 miles to 1 mile<br />

e. 1 mile to 2 miles<br />

f. 2 miles to 2 1/2 miles<br />

g. 2 1/2 miles to 3 miles<br />

h. 3 miles to 5 miles<br />

21. What objects can be used for determ<strong>in</strong><strong>in</strong>g visibility?<br />

22. For variable visibility to be reported, which of the follow<strong>in</strong>g criteria need to be satisfied?<br />

(more than one answer):<br />

visibility is less than 3 miles<br />

visibility is between 2 and 4 miles<br />

visibility is rapidly <strong>in</strong>creas<strong>in</strong>g and decreas<strong>in</strong>g by 1/2 mile or more<br />

visibility changes by 1 mile or more<br />

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